Content .. 80 81 82 83 ..

Mercedes-Benz Sprinter / Dodge Sprinter. Manual - part 82

Symptom:

CAB OPTION

When Monitored and Set Condition:

CAB OPTION

When Monitored:

Ignition On - Once

Set Condition:

When the vehicle line information transmitted does not match the

expected values.

POSSIBLE CAUSES

INTERMITTENT CAB OPTION DTC

DAMAGED CAB/CAB HARNESS CONNECTOR

FUSED OPTIONAL EQUIPMENT RELAY OUTPUT CIRCUIT OPEN

FUSED B(+) CIRCUIT OPEN

GROUND CIRCUIT OPEN

ANTI-LOCK BRAKE CONTROLLER

TEST

ACTION

APPLICABILITY

Turn the ignition on.
With the DRBIII

t, read DTCs.

With the DRBIII

t, erase DTCs.

Turn the ignition off.
Turn the ignition on.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display CAB OPTION?

All

Yes

→ Go To 2

→ Go To 6

Turn the ignition off.
Disconnect the CAB harness connector.
Inspect the CAB/CAB harness connector for damage.
Is there any broken, bent, pushed out, corroded or spread terminals?

All

Yes

→ Repair as necessary.

Perform ABS VERIFICATION TEST - VER 1.

→ Go To 3

BRAKES (CAB)

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the CAB harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused Optional Equipment
Relay Output circuit at the CAB harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?

All

Yes

→ Go To 4

→ Repair the Fused Optional Equipment Relay Output circuit for an

open.
Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the CAB harness connector.
Using a 12-volt test light connected to ground, check both Fused B(+) circuits at the
CAB harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?

All

Yes

→ Go To 5

→ Repair the Fused B(+) circuit for an open.

Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the CAB harness connector.
Using a 12-volt test light connected to 12-volts, check the CAB harness connector
Ground circuits.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?

All

Yes

→ Replace the Controller Antilock Brake in accordance with the

Service Information.
Perform ABS VERIFICATION TEST - VER 1.

→ Repair the Ground circuit for an open.

Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Visually inspect the related wiring harness.
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out, or corroded terminals.
Were any problems found?

All

Yes

→ Repair as necessary.

Perform ABS VERIFICATION TEST - VER 1.

→ Test Complete.

BRAKES (CAB)

CAB OPTION —

Continued

Symptom:

CAN COMMUNICATION ERROR

POSSIBLE CAUSES

CAN DTCS PRESENT IN OTHER MODULES

INTERMITTENT CAN COMMUNICATION ERROR DTC

DAMAGED CAB/CAB HARNESS CONNECTOR

CAN CIRCUIT(S) SHORT TO VOLTAGE

CAN CIRCUIT(S) SHORTED TOGETHER

CAN CIRCUIT(S) SHORT TO GROUND

CAN CIRCUIT(S) OPEN

FUSED OPTIONAL EQUIPMENT RELAY OUTPUT CIRCUIT OPEN

FUSED B(+) CIRCUIT OPEN

GROUND CIRCUIT OPEN

ANTI-LOCK BRAKE CONTROLLER

TEST

ACTION

APPLICABILITY

Turn the ignition on.
NOTE: Diagnose any Steering Angle Sensor DTCs that are present in this
module before continuing.
With the DRBIII

t, read DTCs in the Engine Control Module, Transmission Control

Module, and Instrument Cluster.
Are there any CAN communication DTCs present in any of these modules?

All

Yes

→ Refer to the diagnostic procedures for any CAN DTCs in ECM,

TCM and Cluster before proceeding with this test.
Perform ABS VERIFICATION TEST - VER 1.

→ Go To 2

NOTE: If a system undervoltage or overvoltage DTC is set along with this
DTC, diagnose the system voltage DTC first.
Turn the ignition on.
With the DRBIII

t, erase DTCs.

Turn the ignition off.
Start the engine.
With the DRBIII

t, read DTCs.

Does this DTC reset?

All

Yes

→ Go To 3

→ Go To 11

Turn the ignition off.
Disconnect the CAB harness connector.
Inspect the CAB/CAB harness connector for damage.
Is there any broken, bent, pushed out, corroded or spread terminals?

All

Yes

→ Repair as necessary.

Perform ABS VERIFICATION TEST - VER 1.

→ Go To 4

BRAKES (CAB)

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the CAB harness connector.
Turn the ignition on.
Measure the voltage of the CAN(+) circuit.
Measure the voltage of the CAN(-) circuit.
Is the voltage above 3.0 volts for either circuit?

All

Yes

→ Repair the CAN circuit(s) for a short to voltage.

Perform ABS VERIFICATION TEST - VER 1.

→ Go To 5

Turn the ignition off.
Disconnect the CAB harness connector.
Measure the resistance between ground and the CAN(+) circuit.
Measure the resistance between ground and the CAN(-) circuit.
Is the resistance below 5.0 ohms for either circuit?

All

Yes

→ Repair the CAN circuit(s) for a short to ground.

Perform ABS VERIFICATION TEST - VER 1.

→ Go To 6

Turn the ignition off.
Disconnect the CAB harness connector.
Measure the resistance between the CAN(+) circuit and the CAN(-) circuit.
Is the resistance below 5.0 ohms between the circuits?

All

Yes

→ Repair the shorted CAN circuit(s).

Perform ABS VERIFICATION TEST - VER 1.

→ Go To 7

Turn the ignition off.
Disconnect the Engine Control Module harness connector.
Disconnect the CAB harness connector.
Measure the resistance of the CAN(+) circuit.
Measure the resistance of the CAN(-) circuit.
Is the resistance above 5.0 ohms for either circuit?

All

Yes

→ Repair the CAN circuit(s) for an open

Perform ABS VERIFICATION TEST - VER 1.

→ Go To 8

All

Yes

→ Go To 9

→ Repair the Fused Optional Equipment Relay Output circuit for an

open.
Perform ABS VERIFICATION TEST - VER 1.

BRAKES (CAB)

CAN COMMUNICATION ERROR —

Continued

Content .. 80 81 82 83 ..